Noah Webster
Leaf
LEAF, noun plural leaves.
1. In botany, leaves are organs of perspiration and inhalation in plants. They usually shoot from the sides of the stems and branches, but sometimes from the root; sometimes they are sessile; more generally supported by petioles. They are of various forms, flat, extended, linear, cylindric, etc.
2. The thin, extended part of a flower; a petal.
3. A part of a book containing two pages.
4. The side of a double door. 1 Kings 6:1.
5. Something resembling a leaf in thinness and extension; a very thin plate; as gold leaf
6. The movable side of a table.
LEAF, verb intransitive To shoot out leaves; to produce leaves. The trees leaf in May.